An online measurement and control method for reducing the risk of DC commutation failure

A measurement and control method and commutation failure technology, applied in electrical components, circuit devices, etc., can solve the problems of lack of facilities and technology, and lack of in-depth development, and achieve the effect of convenient testing, improving measurement level, and reducing harmonic pollution.

Active Publication Date: 2017-06-23
STATE GRID CORP OF CHINA +3
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Problems solved by technology

At present, the research on the harmonic transfer characteristics and measurement error of capacitive voltage transformers is mainly in the stage of theoretical qualitative analysis, quantitative analysis combined with actual physical test research has not been carried out in depth, and there are no facilities and technologies that can be practically applied to the field

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  • An online measurement and control method for reducing the risk of DC commutation failure
  • An online measurement and control method for reducing the risk of DC commutation failure
  • An online measurement and control method for reducing the risk of DC commutation failure

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Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] The present invention provides an online measurement and control method for reducing the risk of DC commutation failure. The online measurement and control method is implemented by an online control device, (such as figure 1 ) The online measurement and control device includes a system primary equipment group, an amplitude sensor group, a phase sensor group, a lower computer, an upper computer and a digital quantity processing system, and the system primary equipment group includes a system switch and a transformer group; the method is specifically Include the following steps:

[0048] Step 1: Collect the amplitude information of the transformer group, and transmit the collected amplitude information to the lower computer;

[0049] Step 2: Collect the phase information of the transformer group, and transmit the collected phase information to the lower...

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Abstract

The invention provides an online measurement and control method for reducing the risk of DC commutation failure, which specifically includes the following steps: collecting the amplitude information of the transformer group, and transmitting the collected amplitude information to the lower computer; collecting the phase of the transformer group information, and transmit the collected phase information to the lower computer; the lower computer processes the amplitude information and phase information respectively, and sends the obtained amplitude information digital sampling value and phase information digital sampling value to the upper computer; the upper computer The digital sampling value of the amplitude information and the digital sampling value of the phase information are processed to obtain the amplitude spectrum, phase spectrum and phase sequence; the phase calibration method is used to iterate the amplitude spectrum and phase spectrum; the power quality information is analyzed and controlled by the switch The signal performs the corresponding control operation on the system switch. Compared with the prior art, the invention has the advantages of convenient testing, high efficiency, accurate measurement of each harmonic below the 31st order, and an error of less than 0.2%.

Description

technical field [0001] The invention relates to an online measurement and control method, in particular to an online measurement and control method for reducing the risk of DC commutation failure. Background technique [0002] Capacitive voltage transformers have been developed for more than 40 years abroad, and are widely used in 72.5-800kV power systems. Since the domestic capacitive voltage transformer was born in Xi'an Power Capacitor Factory in 1964, it has also accumulated 35 years of manufacturing and operating experience, and has now entered a mature stage. Especially in recent years, domestic capacitive voltage transformers have made breakthroughs in the improvement of accuracy and output capacity, and the successful use of fast saturated reactance dampers to significantly improve the ferromagnetic resonance damping characteristics and transient response characteristics. . The majority of users in the power sector generally recognize that domestic capacitive volta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00
Inventor 王宇红王轩赵小英燕翚刘平竹桂峻峰胡小刚夏明超
Owner STATE GRID CORP OF CHINA
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